A couple questions about iOS 5 installation on my iPod Touch -- 1. I assume an upgrade to Lion on my desktop is not necessary. Is that right? 2. With the iOS upgrade, will the music stay on my iPod, or will I have to start from scratch and re-load the music? The reason I ask is I've got about 55 gb of music on the iPod, which includes several thousand tracks that are not in my iTunes library (re-ripped at lower bit rates). Thanks.